International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 04 | Apr 2024
p-ISSN: 2395-0072
www.irjet.net
COMPARATIVE STUDY OF SEISMIC ANALYSIS OF VERTICALLY IRREGULAR R.C. FRAME USING INDIAN AND EURO CODE Mr. Akash Vijay Pandey, Er.Bajrang Ambhore , Prof. Shubham Ingole3 1M.Tech Computer Aided Structural Engineering Student WCEM, Nagpur 2Structural Engineering Consultant, Nagpur 3Asst. Professor, Dept. of civil Engineering WCEM, Nagpur
----------------------------------------------------------------------***-----------------------------------------------------------------------irregularities, often resulting from architectural demands Abstract –
or functional requirements, can lead to adverse lateral and torsional responses during earthquakes, making a detailed structural analysis imperative. This study focused on the impact of vertical irregularities, such as soft stories and setbacks, on a building's seismic performance by employing a probabilistic approach to evaluate the relative performance of common vertically irregular structures. With urban infrastructure increasingly featuring such designs, understanding and addressing these vulnerabilities are paramount for enhancing earthquake preparedness and structural safety.
This study explores the impact of various International Standard Codes on the durability, stability, and safety of buildings through dynamic structural analysis. This study meticulously compares the design outcomes influenced by Eurocode 8 and the Indian Standard Code IS 1893:2016, shedding light on their distinct structural characteristics and implications for building design. Key findings include a significant increase in design base shear by up to 67% when employing Eurocode 8 over IS 1893, leading to higher story displacement, particularly at the top of the building, and a marked increase in story drift by up to 65%. Despite these differences, the analysis revealed that the Indian Code yields better structural factor values, indicating superior structural criteria and safety. Notably, the first story experiences the most drift under both codes, with the Indian Standard demonstrating performance within allowable limits for building parameters across spectrum load cases. This comparison highlighted the importance of selecting appropriate standard codes to enhance the structural integrity and safety of buildings in various geographical contexts.
2. OBJECTIVE OF STUDY 1. Investigate and assimilate diverse specifications and recommendations encapsulated within both national and international building codes, with a particular focus on Indian and European standards. 2. Execute dynamic computational analyses of a 23-story building exhibiting vertical irregularities, employing methodologies outlined in both Indian and Eurocode standards.
Keywords: Dynamic structural analysis, IS 1893:2016,
3. The ETABS 2016 software was used to conduct Response Spectrum Analysis (RSA) or Dynamic Analysis on various models designed with Vertical Geometric irregularities to thoroughly understand the structural responses.
Eurocode8 Response reduction factors, Structural safety, Storey drift, Design base shear
1. INTRODUCTION In India, seismic activity threatens more than half of the geographical area, underscoring the critical need for earthquake-resistant construction. Historical data have revealed that buildings with structural anomalies are particularly susceptible to seismic damage. This necessitates a comprehensive understanding of the seismic response of a structure, particularly in low seismic zones, to mitigate structural failures. Irregular construction, characterized by discontinuities in mass, stiffness, and geometric configuration, presents significant challenges in achieving seismic resilience. These
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4. A detailed comparative evaluation of the outcomes derived from critical parameters such as displacement, base shear, story displacement, and story drift during seismic events, considering structures with comparable irregularities and geographic specifications under both coding standards.
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